Force the client to pay

I choose the van velden duffy attorney Rustenburg to help me, two years ago. At first,there's a lady helped me,and she did helped,get some back,but I did pay the deposit for the matters,as they told me that with no deposit,they can not help me.but the things are not yet finished,and they change another lady to help,but no one told me that they are going to change another one to help me,and I didn't know what was happened. After long time,I just called to find out how is the status of my matter,and I found the other lady answer the phone,and told me that she made countless calls and countless emails for my matters,and then she started to tell me that I own the money R10231, I asked her" just proof what did you do,"I want to see from the telkom or mtn or vodacom 's call list,and email list that she called and emailed for my matter. Till now,no one show me what did they do to let me pay voluntary.they just send me the letter say I own money,say that money is for the service,but I don't see the service. "Van velden duffy attorney "is a bandit,force me to pay,without service,I am not happy with them. When I received the letter from this bandit says that I own money, I can't concentrate on work. I have 3 questions： 1... 2years ago,that lady works for vvd attorney,says I own money,when I ask her to proof what did she do,after that was quiet for 2 years,now after 2 years come to tell me to pay,why? 2...when vvd attorney change the person why no one tell me?if they change,maybe I will not let them help me anymore.why no one tell me that they change person?I pay for the service,I can decide who can help me. 3...vvd attorney tell me I own money more than R10000,I don't believe they can do any thing if there's no money in my account.why they still can do so many calls and e-mails without money?they told me that they can't do the jobs with no money in my account.